| 词汇 | delta |
| 词根词缀 | 词源： c.1200, Gk. letter shaped like a triangle, equivalent to our "D," the name from Phoenician daleth "tent door." Herodotus used it of the mouth of the Nile, and it was so used in Eng. from 1555; applied to other river mouths from 1790. Deltoid muscle so called since 1741, from its shape. |
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